@techreport{NBERr0160,
 title = "Why Is There Mandatory Retirement?",
 author = "Edward P. Lazear",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Reprint Series",
 number = "160",
 year = "1981",
 month = "April",
 URL = "http://www.nber.org/papers/r0160",
 abstract = {},
}